/Engine/Source/Runtime/MoviePlayer/Public/MoviePlayer.h
Registers a movie streamer with the movie player. Set in the preloading screen stage.
void RegisterMovieStreamer ( [TSharedPtr](API\Runtime\Core\Templates\TSharedPtr)< [IMovieStreamer](API\Runtime\MoviePlayer\IMovieStreamer), ESPMode::ThreadSafe > InMovieStreamer )